New stable germylenes,stannylenes,and related compounds 7.* Synthesis and structures of compounds Hal-Sn-OCH2CH2NMe2 (Hal=Cl or F)

摘要

New stable divalent tin derivatives containing no bulky substituents at the metal atom,Hal-Sn-OCH2CH2NMe2 (Hal=CI or F),were synthesized,and their crystal structures were studied by X-ray diffraction.Unlike the analogous monomeric divalent germanium derivative CI-Ge-OCH2CH2NMe2,the new compounds are centrosymmetric dimers formed via two intermolecular Sn<-O coordination bonds.